NTC temperature sensor

Abstract

The invention discloses an NTC (Negative Temperature Coefficient) temperature sensor, which relates to the technical field of temperature sensors and comprises two groups of shells, a positioning seat is fixedly connected to the circumferential inner wall of one group of shells, a positioning groove is formed in the top of the positioning seat, an NTC thermistor is clamped in the positioning groove, pins are arranged on two sides of the NTC thermistor, and the NTC thermistor is clamped in the positioning groove. One ends of the two groups of shells are fixedly connected with positioning sleeves, one ends, far away from the NTC thermistor, of the pins are inserted with conductive seats, conductive sheets are arranged in the conductive seats, one ends of the conductive sheets are in contact with one ends of the pins, and one ends, far away from the pins, of the conductive sheets are fixedly connected with connecting wires. Through the effect of the heat transfer ring plate in the heat conduction assembly, external heat can be quickly transferred to the NTC thermistor, so that the response speed of the whole temperature sensor is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature sensors, and in particular to an NTC temperature sensor. Background Art

[0002] NTC refers to the phenomenon and material of thermistor with negative temperature coefficient, whose resistance decreases exponentially with the increase of temperature. NTC temperature sensor is a thermistor potted with epoxy resin in an ordinary metal shell. This potting method easily causes the thermistor to not be close to the inner wall of the shell, and the filled resin is not conducive to the conduction of temperature, so that the temperature detected by the thermistor cannot respond in time, affecting the sensitivity of the thermistor, and it is impossible to ensure that the NTC temperature sensor truly reflects the changes in the external temperature.

[0003] After searching, the Chinese patent with announcement number CN218885194U discloses an NTC temperature sensor, including a housing, a thermistor and a wire. The above device electrically connects the thermistor and an external device through the wire, and the thermistor corresponds to the pores so that the gas in the external environment can flow through the pores to the thermistor, so that the thermistor can quickly respond to the temperature of the external environment, improve the sensitivity of the sensor, and timely reflect the temperature changes of the external environment.

[0004] Based on the prior art, it is found that the above device still has the following deficiencies: the response speed of the thermistor cannot be significantly improved by simply opening through pores on the outer periphery of the shell, and the opened pores will also greatly reduce the sealing of the entire temperature sensor, affecting the service life of the sensor. At the same time, a large number of packaging layers are filled between the thermistor and the shell in the above sensor, and no heat-conducting structure is provided. Since the thermal conductivity of the packaging layer is general, the response speed of the thermistor is reduced. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose an NTC temperature sensor. Its advantage is that when the external temperature changes suddenly, the heat from the outside can be quickly transferred to the NTC thermistor through the action of the heat transfer ring plate in the heat conduction component, thereby greatly improving the response speed of the entire temperature sensor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An NTC temperature sensor comprises a shell, wherein the shell is in two groups, a positioning seat is fixedly connected to the circumferential inner wall of the shell of one group, a positioning groove is provided on the top of the positioning seat, an NTC thermistor is clamped inside the positioning groove, pins are provided on both sides of the NTC thermistor, one end of the shell of the two groups is fixedly connected to a positioning sleeve, one end of the pin away from the NTC thermistor is plugged with a conductive seat, a conductive sheet is provided inside the conductive seat, one end of the conductive sheet contacts one end of the pin, one end of the conductive sheet away from the pin is fixedly connected to a connecting wire, and one end of the conductive seat passes through the inside of the positioning sleeve;

[0008] A heat-conducting component for rapid heat transfer is arranged inside the shell;

[0009] A locking assembly is disposed outside the housing;

[0010] A partition is fixedly connected to the circumferential inner wall of the shell, and the interior of the shell is filled with packaging resin, and the packaging resin is in contact with an outer wall of one side of the partition.

[0011] Through the above technical solution: when the external temperature changes suddenly, the heat from the outside can be quickly transferred to the NTC thermistor through the joint action of the heat conducting component and the locking component, thereby greatly improving the response speed of the entire temperature sensor.

[0012] The present invention is further configured as follows: the NTC thermistor includes a rectangular portion and a spherical portion, both side outer walls of the rectangular portion are provided with assembly grooves, the cross-section of the assembly groove is T-shaped, one end of the pin is clamped in the interior of the assembly groove, the spherical portion is located at the end of the rectangular portion, the circumferential outer wall of the spherical portion is provided with a groove, the cross-section of the groove is semicircular, and the encapsulation resin penetrates into the assembly groove and the interior of the groove.

[0013] Through the above technical scheme: since the cross-section of the spherical part is circular, the contact area with the external environment can be effectively expanded, so that more heat or cold in the external environment can be received, and the circumferential outer wall of the spherical part is provided with a groove, and the cross-section of the groove is semicircular, so it can not only further increase the contact area between the outer surface of the spherical part and the external environment, but also can quickly penetrate into the groove when the packaging resin is subsequently filled, ensuring that the packaging resin and the spherical part are closely fitted, and further improving the stability of the NTC thermistor inside the temperature sensor after packaging.

[0014] The present invention is further configured such that connecting ears are fixedly connected at the four corners of the two groups of shells, a positioning hole is opened on the top outer wall of the connecting ear of one group of shells, and a positioning column is fixedly connected to the bottom outer wall of the connecting ear of the other shell, and the positioning column cooperates with the positioning hole.

[0015] Through the above technical solution: by inserting the positioning column into the positioning hole, the initial fixing and sealing of the two sets of shells can be achieved.

[0016] The present invention is further configured such that the locking assembly includes an external thread arranged on the circumferential outer wall of the shell, a fixed sleeve is arranged on the outside of the shell, an internal thread is arranged on the circumferential inner wall of the fixed sleeve, the internal thread is threadedly connected to the external thread, a baffle is fixedly connected to the circumferential outer wall of the shell, and one end of the fixed sleeve is pressed against an outer wall on one side of the baffle.

[0017] Through the above technical solution, the fixing sleeve can be tightly connected with the shell through the mutual meshing between the internal thread of the fixing sleeve and the external thread of the outer wall of the shell, thereby achieving the reinforcement effect on the shell.

[0018] The present invention is further configured such that a first heat conducting plate is fixedly connected to the circumferential outer wall of the fixed sleeve, the first heat conducting plates are distributed in a circular shape with equal distances on the circumferential outer wall of the fixed sleeve, an end of the first heat conducting plate away from the circumferential outer wall of the fixed sleeve is fixedly connected to a second heat conducting plate, the cross-section of the second heat conducting plate is V-shaped, and an end of the second heat conducting plate away from the first heat conducting plate is fixedly connected to a copper ring plate.

[0019] Through the above technical solution: the position where the fixed sleeve is reinforced on the outer surface of the shell is located outside the spherical part of the NTC thermistor and the heat-conducting component, so the absorbed energy can be quickly transferred to the heat-conducting component and the NTC thermistor, avoiding a large amount of energy loss during the transfer process, and the first heat-conducting sheet and the second heat-conducting sheet arranged on the outer wall of the fixed sleeve cooperate to form a Y-shaped structure, thereby effectively expanding the contact area between the fixed sleeve and the external environment, ensuring that the fixed sleeve can absorb more energy from the external environment, and further improving the response speed of the entire temperature sensor.

[0020] The present invention is further configured such that a group of circumferential inner walls of the shell are fixedly connected to a limiting ring plate, and two sides of the heat conducting component are respectively in contact with the limiting ring plate and one side outer wall of the positioning seat.

[0021] Through the above technical solution: through the joint action of the limiting ring plates and the positioning seats arranged at both ends of the heat-conducting component, the overall stability of the heat-conducting component after installation can be effectively guaranteed.

[0022] The present invention is further configured such that the heat-conducting component includes a circular ring tube, which is sleeved on the outside of the spherical portion, the circumferential inner wall of the circular ring tube is in contact with the encapsulation resin, the circumferential outer wall of the circular ring tube is fixedly connected with a heat transfer ring plate, the heat transfer ring plates are distributed in an equidistant circle on the circumferential outer wall of the circular ring tube, both ends of the circular ring tube are fixedly connected with circular plates, and one side of the circular ring plate is fixedly connected to one side outer wall of the heat transfer ring plate.

[0023] Through the above technical solution: when the external ambient temperature changes suddenly, the energy will be transferred to the heat transfer ring plate through the shell, and the circular ring plates on both sides of the heat transfer ring plate can maintain sealing, and no packaging resin will enter, thereby ensuring that the heat transfer rate of the heat transfer ring plate will not be affected by the packaging resin.

[0024] The present invention is further configured such that the cross section of the heat transfer ring plate is in the shape of a turbine blade, and an outer wall of one side of the heat transfer ring plate is in contact with the circumferential inner wall of the shell.

[0025] Through the above technical solution, the energy transferred to the heat transfer ring plate can form a vortex on the outer wall of the circular tube, so that the heat is concentratedly transferred to the circular tube.

[0026] The present invention is further configured such that the heat transfer ring plate includes an end portion, a conduction portion and a connection portion, the end portion and the circumferential outer wall of the conduction portion are in contact with the circumferential inner wall of the shell, one end of the connection portion is fixedly connected to the circular ring tube, the cross-section of the end portion is drop-shaped, and the thickness of the conduction portion gradually decreases in the direction approaching the connection portion.

[0027] Through the above technical scheme: the cross-section of the end portion of the heat transfer ring plate away from the connecting portion is in a teardrop shape, thereby increasing the contact area between the end portion and the external shell, so that the end portion can absorb more energy, thereby compensating for the situation where the energy transfer efficiency decreases due to the end portion being far away from the connecting portion, and the thickness of the conduction portion in the heat transfer ring plate gradually decreases in the direction close to the connecting portion, so as to enable the heat transfer speed and efficiency of each area of ​​the entire heat transfer ring plate to be kept average, thereby ensuring the accuracy of the entire temperature sensor in measuring temperature.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention can effectively expand the contact area between the NTC thermistor and the external environment, so that the entire temperature sensor can respond faster and the temperature measurement data is more accurate when performing temperature measurement. Specifically, by providing a spherical part and a rectangular part, it can ensure that the encapsulation resin and the spherical part are closely fitted, and the stability of the NTC thermistor inside the temperature sensor after encapsulation is further improved.

[0030] 2. The present invention can effectively ensure the stability of the connection between the two groups of shells, and at the same time can absorb more energy of temperature changes in the external environment to the shells, which is beneficial to the rapid conduction of the subsequent heat-conducting component to the surface temperature of the shells. Specifically, by providing a locking component, a first heat-conducting plate and a second heat-conducting plate, the contact area between the fixed sleeve and the external environment can be effectively expanded, ensuring that the fixed sleeve can absorb more energy from the external environment, and further improving the response speed of the entire temperature sensor.

[0031] 3. The present invention can quickly transfer the energy of temperature changes in the external environment to the NTC thermistor inside the shell, thereby accelerating the response speed of the NTC thermistor and making the temperature measurement of the entire temperature sensor faster. Specifically, by providing a heat-conducting component, the contact area between the end head and the external shell can be increased, so that the end head can absorb more energy, thereby compensating for the situation that the energy transfer efficiency is reduced due to the end head being far away from the connecting part, thereby ensuring the accuracy of the temperature measurement of the entire temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of an NTC temperature sensor proposed by the present invention;

[0033] Figure 2 A schematic diagram of the disassembled structure of a housing and a locking assembly of an NTC temperature sensor proposed by the present invention;

[0034] Figure 3 An NTC temperature sensor proposed by the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0035] Figure 4 A schematic diagram of a half-section top view of an NTC temperature sensor proposed by the present invention;

[0036] Figure 5 A schematic cross-sectional view of an NTC temperature sensor proposed by the present invention;

[0037] Figure 6 An NTC temperature sensor proposed by the present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0038] Figure 7 A schematic diagram of a half-section structure of a locking assembly of an NTC temperature sensor proposed by the present invention;

[0039] Figure 8 An NTC temperature sensor proposed by the present invention Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0040] Fig. 9This is a schematic diagram of the cross-sectional end surface structure of a locking assembly of an NTC temperature sensor proposed by the present invention;

[0041] Fig.10 The present invention is a schematic diagram of the disassembled structure of a locking assembly of an NTC temperature sensor proposed in the present invention.

[0042] In the figure: 1, shell; 2, locking assembly; 2001, copper ring plate; 2002, internal thread; 2003, external thread; 2004, baffle; 2005, fixing sleeve; 2006, first heat conductive sheet; 2007, second heat conductive sheet; 3, positioning sleeve; 4, connecting wire; 5, conductive seat; 6, partition; 7, pin; 8, NTC thermistor; 8001, spherical part; 8002, rectangular part; 8003, assembly groove; 8004, groove; 9, heat conductive assembly; 9001, circular ring plate; 9002, circular ring tube; 9003, end head; 9004, conduction part; 9005, connection part; 10, positioning seat; 11, positioning groove; 12, packaging resin; 13, connecting ear; 14, limit ring plate; 15, conductive sheet; 16, positioning hole. DETAILED DESCRIPTION

[0043] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] Reference Figure 1-Figure 10 , an NTC temperature sensor, comprising a shell 1, the number of the shells 1 is two groups, a circumferential inner wall of one group of shells 1 is fixedly connected with a positioning seat 10, a top of the positioning seat 10 is provided with a positioning groove 11, an NTC thermistor 8 is clamped inside the positioning groove 11, both sides of the NTC thermistor 8 are provided with pins 7, one end of the two groups of shells 1 is fixedly connected with a positioning sleeve 3, the end of the pin 7 away from the NTC thermistor 8 is plugged with a conductive seat 5, a conductive sheet 15 is provided inside the conductive seat 5, one end of the conductive sheet 15 is in contact with one end of the pin 7, the end of the conductive sheet 15 away from the pin 7 is fixedly connected with a connecting wire 4, and one end of the conductive seat 5 passes through the interior of the positioning sleeve 3;

[0046] A heat-conducting component 9 for rapid heat transfer is arranged inside the housing 1;

[0047] A locking assembly 2 is provided outside the housing 1;

[0048] The circumferential inner wall of the shell 1 is fixedly connected with a partition 6, and the interior of the shell 1 is filled with a packaging resin 12. The packaging resin 12 is in contact with an outer wall of one side of the partition 6. When the external temperature changes suddenly, the heat from the outside can be quickly transferred to the NTC thermistor 8 through the joint action of the heat conducting component 9 and the locking component 2, thereby greatly improving the response speed of the entire temperature sensor.

[0049] In order to improve the response speed of the entire temperature sensor, refer to Figure 4-Figure 10 The NTC thermistor 8 includes a rectangular portion 8002 and a spherical portion 8001. The outer walls of both sides of the rectangular portion 8002 are provided with assembly grooves 8003. The cross section of the assembly groove 8003 is T-shaped. One end of the pin 7 is clamped inside the assembly groove 8003. The spherical portion 8001 is located at the end of the rectangular portion 8002. The circumferential outer wall of the spherical portion 8001 is provided with a groove 8004. The cross section of the groove 8004 is semicircular. The encapsulation resin 12 penetrates into the interior of the assembly groove 8003 and the groove 8004. When the temperature sensor is in use, when the external environment temperature changes, due to the spherical portion 8 The cross-section of 001 is circular, so it can effectively expand the contact area with the external environment, so as to receive more heat or cold from the external environment, and a groove 8004 is provided on the circumferential outer wall of the spherical part 8001, and the cross-section of the groove 8004 is semicircular, so it can not only further increase the contact area between the outer surface of the spherical part 8001 and the external environment, but also can quickly penetrate into the groove 8004 when the packaging resin 12 is subsequently filled, thereby ensuring that the packaging resin 12 is tightly fitted to the spherical part 8001, and further improving the stability of the NTC thermistor 8 inside the temperature sensor after packaging.

[0050] In order to enable the two sets of housings 1 to be assembled quickly, refer to Figure 2-Figure 4 The four corners of the two shells 1 are fixedly connected with connecting ears 13, the top outer wall of the connecting ear 13 of one shell 1 is provided with a positioning hole 16, and the bottom outer wall of the connecting ear 13 of the other shell 1 is fixedly connected with a positioning column, and the positioning column cooperates with the positioning hole 16. When the staff needs to combine and install the temperature sensor, the bonding surfaces of the two shells 1 can be coated with sealant, and the initial fixing and sealing of the two shells 1 can be achieved by inserting the positioning column into the positioning hole 16.

[0051] In order to ensure the overall stability of the two sets of housings 1 after docking and installation, refer to Figure 2The locking assembly 2 includes an external thread 2003 arranged on the circumferential outer wall of the shell 1, a fixed sleeve 2005 is arranged on the outside of the shell 1, and an internal thread 2002 is arranged on the circumferential inner wall of the fixed sleeve 2005, and the internal thread 2002 is threadedly connected to the external thread 2003. A baffle 2004 is fixedly connected to the circumferential outer wall of the shell 1, and one end of the fixed sleeve 2005 is tightly pressed against the outer wall of one side of the baffle 2004. The staff sleeves the fixed sleeve 2005 on the outer surface of the shell 1 and rotates it. At this time, the fixed sleeve 2005 can achieve a tight connection between the fixed sleeve 2005 and the shell 1 through the mutual engagement between the internal internal thread 2002 and the external thread 2003 on the outer wall of the shell 1, thereby achieving a reinforcement effect on the shell 1.

[0052] In order to quickly transfer the temperature change of the external environment to the outer wall of the fixed sleeve 2005, refer to Figure 7-Figure 8 The circumferential outer wall of the fixed sleeve 2005 is fixedly connected with a first heat conducting sheet 2006, and the first heat conducting sheets 2006 are distributed in an equidistant circle on the circumferential outer wall of the fixed sleeve 2005. The end of the first heat conducting sheet 2006 away from the circumferential outer wall of the fixed sleeve 2005 is fixedly connected with a second heat conducting sheet 2007, and the cross section of the second heat conducting sheet 2007 is V-shaped. The end of the second heat conducting sheet 2007 away from the first heat conducting sheet 2006 is fixedly connected with a copper ring plate 2001. The position where the fixed sleeve 2005 is reinforced on the outer surface of the shell 1 is located exactly at the NTC thermistor. The spherical portion 8001 of the resistor 8 and the outside of the heat-conducting component 9 can quickly transfer the absorbed energy to the heat-conducting component 9 and the NTC thermistor 8, avoiding a large amount of energy loss in the transfer process, and the first heat-conducting sheet 2006 and the second heat-conducting sheet 2007 arranged on the outer wall of the fixed sleeve 2005 cooperate to form a Y-shaped structure, thereby effectively expanding the contact area between the fixed sleeve 2005 and the external environment, ensuring that the fixed sleeve 2005 can absorb more energy from the external environment, and further improving the response speed of the entire temperature sensor.

[0053] In order to ensure the overall stability of the heat conducting assembly 9 after installation, refer to Figure 4 A set of the inner circumferential walls of the shell 1 are fixedly connected with a limiting ring plate 14, and the two sides of the heat-conducting component 9 are respectively in contact with the limiting ring plate 14 and the outer wall of one side of the positioning seat 10. Through the joint action of the limiting ring plates 14 and the positioning seat 10 arranged at both ends of the heat-conducting component 9, the overall stability of the heat-conducting component 9 after installation can be effectively guaranteed.

[0054] Reference Figure 2 , Figure 4-Figure 10, an NTC temperature sensor, this embodiment also includes a heat conduction component 9 including a circular tube 9002, the circular tube 9002 is sleeved on the outside of the spherical part 8001, the circumferential inner wall of the circular tube 9002 is in contact with the packaging resin 12, the circumferential outer wall of the circular tube 9002 is fixedly connected with a heat transfer ring plate, the heat transfer ring plates are distributed in an equidistant circle on the circumferential outer wall of the circular tube 9002, both ends of the circular tube 9002 are fixedly connected with circular plates 9001, one side of the circular plate 9001 is fixedly connected to the outer wall of one side of the heat transfer ring plate, when the external environment temperature changes suddenly, energy will be transferred to the heat transfer ring plate through the shell 1, and the circular plates 9001 on both sides of the heat transfer ring plate can be kept sealed, and the packaging resin 12 will not enter, thereby ensuring that the heat transfer rate of the heat transfer ring plate will not be affected by the packaging resin 12.

[0055] In order to transfer the heat to the outer wall of the annular tube 9002, refer to Figure 9-10 The cross section of the heat transfer ring plate is in the shape of a turbine blade. The outer wall of one side of the heat transfer ring plate is in contact with the circumferential inner wall of the shell 1. The energy transferred to the heat transfer ring plate can form a vortex on the outer wall of the circular tube 9002, so that the heat is concentrated and transferred to the circular tube 9002.

[0056] In order to make the heat transfer ring plate transfer external energy to the outer wall of the annular tube 9002 uniformly, refer to Figure 9-10 The heat transfer ring plate includes an end portion 9003, a conduction portion 9004 and a connection portion 9005. The circumferential outer walls of the end portion 9003 and the conduction portion 9004 are in contact with the circumferential inner wall of the shell 1. One end of the connection portion 9005 is fixedly connected to the annular tube 9002. The cross section of the end portion 9003 is in a teardrop shape. The thickness of the conduction portion 9004 gradually decreases in the direction close to the connection portion 9005. The cross section of the end portion 9003 of the heat transfer ring plate away from the connection portion 9005 is in a teardrop shape, thereby increasing the contact area with the external shell 1, so that the end portion 9003 can absorb more energy, thereby compensating for the fact that the energy transfer efficiency decreases due to the end portion 9003 being far away from the connection portion 9005. The thickness of the conduction portion 9004 in the heat transfer ring plate gradually decreases in the direction close to the connection portion 9005, so as to keep the heat transfer speed and efficiency of each area of ​​the entire heat transfer ring plate average, thereby ensuring the accuracy of the entire temperature sensor in measuring temperature.

[0057] Working principle: When the temperature sensor is in use and the ambient temperature changes, the spherical portion 8001 has a circular cross section, so that the contact area with the ambient environment can be effectively expanded, thereby receiving more heat or cold from the ambient environment. A groove 8004 is provided on the circumferential outer wall of the spherical portion 8001, and the cross section of the groove 8004 is semicircular. Therefore, not only can the contact area between the outer surface of the spherical portion 8001 and the ambient environment be further increased, but also the encapsulation resin 12 can quickly penetrate into the groove 8004 when it is subsequently filled, ensuring that the encapsulation resin 12 fits tightly with the spherical portion 8001, further improving the stability of the NTC thermistor 8 inside the temperature sensor after encapsulation, and when the staff needs to adjust the temperature, When the sensor is assembled and installed, the bonding surfaces of the two groups of shells 1 can be coated with sealant. By inserting the positioning column into the positioning hole 16, the two groups of shells 1 can be initially fixed and sealed. Then the staff sets the fixing sleeve 2005 on the outer surface of the shell 1 and rotates it. At this time, the fixing sleeve 2005 can achieve a tight connection between the fixing sleeve 2005 and the shell 1 through the mutual engagement between the internal internal screw thread 2002 and the external thread 2003 of the outer wall of the shell 1, thereby achieving a reinforcement effect on the shell 1. At the same time, the position where the fixing sleeve 2005 is reinforced on the outer surface of the shell 1 is located outside the spherical part 8001 of the NTC thermistor 8 and the heat-conducting component 9, so that the absorbed energy can be quickly transferred to the heat-conducting component 9 and the NTC thermistor 8. TC thermistor 8, avoids a large amount of energy loss during the transfer process, and the first heat conductive sheet 2006 and the second heat conductive sheet 2007 arranged on the outer wall of the fixed sleeve 2005 cooperate to form a Y-shaped structure, thereby effectively expanding the contact area between the fixed sleeve 2005 and the external environment, ensuring that the fixed sleeve 2005 can absorb more energy from the external environment, and further improving the response speed of the entire temperature sensor. When the external environment temperature changes suddenly, the energy will be transferred to the heat transfer ring plate through the shell 1, and the circular ring plates 9001 arranged on both sides of the heat transfer ring plate can maintain sealing, and no packaging resin 12 will enter, thereby ensuring that the heat transfer rate of the heat transfer ring plate will not be affected by the packaging resin 12, and the energy transferred to the heat transfer ring plate The amount can form eddies on the outer wall of the annular tube 9002, so that the heat is concentratedly transferred to the annular tube 9002. In the process of the heat transfer ring plate transferring energy to the annular tube 9002, since the heat transfer efficiency between metals is higher than that of air, the cross-section of the end portion 9003 of the heat transfer ring plate away from the connecting portion 9005 is in the shape of a teardrop, thereby increasing the contact area with the external shell 1, so that the end portion 9003 can absorb more energy, thereby compensating for the fact that the energy transfer efficiency decreases due to the end portion 9003 being far away from the connecting portion 9005. In addition, the thickness of the conduction portion 9004 in the heat transfer ring plate gradually decreases in the direction close to the connecting portion 9005, so as to keep the heat transfer speed and efficiency of each area of ​​the entire heat transfer ring plate average.The accuracy of the temperature sensor in measuring temperature is guaranteed.

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An NTC temperature sensor, comprising a housing (1), characterized in that: The number of the shells (1) is two groups. A positioning seat (10) is fixedly connected to the circumferential inner wall of one group of the shells (1). A positioning groove (11) is provided on the top of the positioning seat (10). An NTC thermistor (8) is clamped inside the positioning groove (11). Pins (7) are provided on both sides of the NTC thermistor (8). One end of the two groups of the shells (1) is fixedly connected to a positioning sleeve (3). The end of the pin (7) away from the NTC thermistor (8) is plugged with a conductive seat (5). A conductive sheet (15) is provided inside the conductive seat (5). One end of the conductive sheet (15) is in contact with one end of the pin (7). The end of the conductive sheet (15) away from the pin (7) is fixedly connected to a connecting wire (4). One end of the conductive seat (5) passes through the interior of the positioning sleeve (3). A heat-conducting component (9) for rapid heat transfer is arranged inside the housing (1); A locking assembly (2) is arranged outside the housing (1); A partition plate (6) is fixedly connected to the circumferential inner wall of the shell (1), and the interior of the shell (1) is filled with a packaging resin (12), and the packaging resin (12) is in contact with an outer wall of one side of the partition plate (6).

2. The NTC temperature sensor according to claim 1, characterized in that: The NTC thermistor (8) comprises a rectangular portion (8002) and a spherical portion (8001), the outer walls on both sides of the rectangular portion (8002) are provided with assembly grooves (8003), the cross section of the assembly groove (8003) is T-shaped, one end of the pin (7) is clamped inside the assembly groove (8003), the spherical portion (8001) is located at the end of the rectangular portion (8002), the circumferential outer wall of the spherical portion (8001) is provided with a groove (8004), the cross section of the groove (8004) is semicircular, and the encapsulation resin (12) penetrates into the assembly groove (8003) and the inside of the groove (8004).

3. The NTC temperature sensor according to claim 2, characterized in that: The four corners of the two groups of shells (1) are fixedly connected with connecting ears (13), the top outer wall of the connecting ears (13) of one group of shells (1) is provided with a positioning hole (16), and the bottom outer wall of the connecting ears (13) of the other group of shells (1) is fixedly connected with a positioning column, and the positioning column cooperates with the positioning hole (16).

4. The NTC temperature sensor according to claim 3, characterized in that: The locking assembly (2) comprises an external thread (2003) arranged on the circumferential outer wall of the shell (1); a fixed sleeve (2005) is arranged outside the shell (1); an internal thread (2002) is arranged on the circumferential inner wall of the fixed sleeve (2005); the internal thread (2002) is threadedly connected to the external thread (2003); a baffle (2004) is fixedly connected to the circumferential outer wall of the shell (1); one end of the fixed sleeve (2005) is pressed against the outer wall of one side of the baffle (2004).

5. The NTC temperature sensor according to claim 4, characterized in that: A first heat-conducting plate (2006) is fixedly connected to the circumferential outer wall of the fixed sleeve (2005); the first heat-conducting plates (2006) are distributed in a circular pattern at equal distances on the circumferential outer wall of the fixed sleeve (2005); one end of the first heat-conducting plate (2006) away from the circumferential outer wall of the fixed sleeve (2005) is fixedly connected to a second heat-conducting plate (2007); the cross-section of the second heat-conducting plate (2007) is V-shaped; and one end of the second heat-conducting plate (2007) away from the first heat-conducting plate (2006) is fixedly connected to a copper ring plate (2001).

6. The NTC temperature sensor according to claim 2, characterized in that: A set of circumferential inner walls of the shell (1) are fixedly connected to a limiting ring plate (14), and two sides of the heat conducting component (9) are respectively in contact with the limiting ring plate (14) and one side outer wall of the positioning seat (10).

7. The NTC temperature sensor according to claim 2, characterized in that: The heat-conducting component (9) comprises a circular tube (9002), wherein the circular tube (9002) is sleeved on the outside of the spherical portion (8001), the circumferential inner wall of the circular tube (9002) is in contact with the packaging resin (12), the circumferential outer wall of the circular tube (9002) is fixedly connected to a heat transfer ring plate, and the heat transfer ring plates are distributed in a circular shape at equal distances on the circumferential outer wall of the circular tube (9002), and the two ends of the circular tube (9002) are fixedly connected to the circular plates (9001), and one side of the circular plate (9001) is fixedly connected to the outer wall of one side of the heat transfer ring plate.

8. The NTC temperature sensor according to claim 7, characterized in that: The cross section of the heat transfer ring plate is in the shape of a turbine blade, and an outer wall on one side of the heat transfer ring plate is in contact with the circumferential inner wall of the shell (1).

9. The NTC temperature sensor according to claim 7, characterized in that: The heat transfer ring plate comprises an end portion (9003), a conduction portion (9004) and a connection portion (9005); the circumferential outer walls of the end portion (9003) and the conduction portion (9004) are in contact with the circumferential inner wall of the shell (1); and one end of the connection portion (9005) is fixedly connected to the annular tube (9002).

10. The NTC temperature sensor according to claim 9, characterized in that: The cross section of the end portion (9003) is in the shape of a teardrop, and the thickness of the conducting portion (9004) gradually decreases in a direction approaching the connecting portion (9005).

Images